Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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Aug 24, 2016 21:22:26 GMT
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Noooooo!
That's terrible news.
On the plus side, I've just finished my own engine swap, so I have a stock 1500 that needs rebuilding if it's any use.
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Aug 25, 2016 13:19:46 GMT
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So
I was just using about 7700 rpm to change as i was still warming the tyres up but of course the damage could have been done at any of the previous 3 events or rolling road since fitting it!
The rods are steel H Beam rods normally used in 500+HP turbo engines. The cause of the failure looks like the bearing at present. No idea why yet........
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Aug 25, 2016 13:43:18 GMT
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7700 is a long way past peak power
I understand the need to go past peak
Still a shame to see all the hard work end up on the floor I love this build nice to see an avenger working for a living
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Last Edit: Aug 25, 2016 14:28:35 GMT by avengertec
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Aug 25, 2016 15:14:01 GMT
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Yes it is past peak power but sometimes it is necessary to save a couple of gear changes. The rev limit was set by NMS higher than though...
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MiataMark
Club Retro Rides Member
Posts: 2,971
Club RR Member Number: 29
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Aug 25, 2016 15:35:21 GMT
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Remember reading about a description of a cars retirement in 60's F1.
Retired due to electrical problems.... a con rod took out the alternator.
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1990 Mazda MX-52012 BMW 118i (170bhp) - white appliance 2011 Land Rover Freelander 2 TD4 2003 Land Rover Discovery II TD52007 Alfa Romeo 159 Sportwagon JTDm
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Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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Aug 25, 2016 20:51:58 GMT
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There's a 1600 block on ebay
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Sept 1, 2016 12:51:19 GMT
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The engine is now with a team of chaps who will endeavour to find out why it failed......
SO the next task is to build my spare engine back up which I lent out to a mate who promptly broke it on the first corner of the first stage.....
There is a theme here - Nev + Engine = Broken
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Sept 1, 2016 17:45:19 GMT
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just read whole thread, amazing bit of work - especially the power output on the pushrod motor! commiserations on the recent set-back www.agkits.com/bearing-failure-analysis.aspx big end shell failure analysis from shell appearance |
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Have really enjoyed reading your thread, Nev. I started reading it for the in-depth fitment/testing of the megasquirt and then got hooked on the competitions and the vids :-)
Sorry to hear of the engine woes; am sure you'll get it sorted.
Matt
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"Mechanical Power Subduing Animal Speed" (Robert Trevithick, 1808)
'72 BMW 2000 Touring
'99 TT 180 (mrs)
'72 BMW 2500
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Sept 2, 2016 13:11:07 GMT
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Well without an engine at present its a bit of a pain but i was putting some stuff away for the Sunbeam project when i came across a set of C180 brakes. Well it would be rude not to..........  image by Nevtiger, on Flickr This also has the added advantage of allowing me to fit a handbrake again :-) |
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Last Edit: Sept 2, 2016 13:11:31 GMT by nevtiger
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Sept 3, 2016 17:14:23 GMT
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I also wanted to see if i could limit the amount of three wheeling i have been doing so: I whipped the back up  image by Nevtiger, on Flickr And extended the bump stops using some spare Bilstien ones:  image by Nevtiger, on Flickr |
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Sept 3, 2016 17:15:27 GMT
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Now with the classic drilled disc look to!  image by Nevtiger, on Flickr |
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Last Edit: Apr 24, 2017 17:42:53 GMT by nevtiger
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820
South East
Posts: 793
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Sept 10, 2016 13:16:57 GMT
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Whats the thinking behind the bump stop three wheeling cure?
Any news on the engine diagnosis?
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Sept 19, 2016 14:50:31 GMT
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No news on the engine but i have been away on holiday and only back today.
The thinking for the 3 wheeling cure is to increase the rear roll stiffness as the car loads up on that side. The springs are already 'dual' stage as it were. The extra bump stops means that the spring rate just gets much higher as the cars leans over and the bump stop begins to engage. the rate rises very quickly but i have found that the car feels very steady but just with too much lean. I could increase the slow speed bump damping i guess, but i am not sure if that would be the ideal cure. I am not sure if its enough or too much rubber as i will have experiment.
The spare engine is going back together now and i shall hopefully be able to test the bump stop increase sometime soon.............
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Sept 20, 2016 9:36:14 GMT
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increasing the effective spring rate on the rear will make it 3 wheel more, as it will run out of weight to transfer sooner. most likely cure will be front vertical spring rate (if the handling can tolerate it) or if not front roll stiffness
*edit* ignore that, advice for rear cocking. yours is cocking the front?
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Last Edit: Sept 20, 2016 10:19:07 GMT by darrenh
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Sept 20, 2016 17:20:53 GMT
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Yes. Cocking a front wheel.
Rate for springs is 350lb and anti roll is now 3 x standard.
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Sept 20, 2016 17:23:43 GMT
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News:
Engine failure was due to oil drive spur gear failure. This meant oil pump stopped instantly........ Engine followed shortly after.
If I had still been running a dizzy the engine would have stopped with possibly no further damage.
Next oil will have the ecu monitoring oil pressure and will have an engine stop programmed in!
Which means nothing other than the head and roller rockers have survived.
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Sept 20, 2016 20:49:48 GMT
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curse word! You will need to start all over again... The spare engine is ready to mount the head? Or do you need to rebuilt it completely?
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FJSigma
1989 Volkswagen VW1500 (The argentinian Avenger)
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Sept 21, 2016 20:58:52 GMT
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Spare engine is a new build using some new parts and some parts that are hanging around in the garage but uses a new head identical to my race engine.
As to the replacement for the blown engine? I am not sure what to do at present 🙁 Todo esta roto!
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I have just been informed that I have an entry into this years French Hillclimb Masters event at Saint Gueono.
Now considering the car has no engine built or otherwise and no rear brakes then methinks I should get a move on.....
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